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(No Model.)

H. M. HALL.

JOINT FOR PIPES, &c. No, 327,793. Patented Oct. 6, 1885.

WITNESSES:

N PETER& PhoXn-Uflwgmphen Washington. D4 c.

UNITED STATES PATENT OFFICE.

HENRY M. HALL, OF: PHILADELPHIA, PENNSYLVANIA.

JOINT FOR PIPES, 84c.

S1=ECIFICATION formingpart of Letters Patent No. 327,? 93, dated October 6, 1885.

Application filed April 17. I885. Serial No. 162,527. (X0 model.)

T 0 all whom it may concern:

Be it known that I, HENRY M. HALL, a citizen of the United States, residing in the city and county oflhiladelphia, State ofPennsylvania, have invented a new and useful Improvement in Joints for Pipes, &c., which improvement is fully set forth in the following specification and accompanying drawing, in which the figure represents a section of a 0 joint embodying my invention.

My invention consists of ajoint for a pipe, rod, &c., whereby leakage thereat, is prevented.

Referring to the drawing, A represents a piece of pipe, rod, shail, valve-stem, &c., on which is fitted an exteriorly-threadcd unsplitor solid sleeve or socket, B, which primarily freely embraces said piece A.

0 represents an exteriorly-threaded not for compressing said sleeve B upon the piece A, the threads of the two parts being fine.

The exterior surface of the sleeve B and the interior opening of the nutare tapering, but the tapers are at a different angle or pitch, the pitch of the opening of the nut being greater than that of the surface of the sleeve.

When the nut is fitted to the sleeve and r0- tat-ed thereon, it engages with the threads thereof and climbs on said sleeve, the narrowest portion of its diameter, which is consider ably less than that of the narrow end of the sleeve, gradually tightening against said end and adjacent portion of the sleeve, so thatby a few turns of said not the sleeve is forcibly compressed against the piece A uniformly around the same, thus closingthejoint between the sleeve and piece in a tight and reliable manner and preventing leakage thereat.

When the sleeve is relieved of the not, it

springs sufficiently to permit its removal from operating substantially as and for the purpose sct forth.

HENRY M. HALL.

\Vitnemes:

J oaN A; WIEDERsHEIM, A. P. GRANT. 

